May 10 (GMM) Mercedes has changed its position yet again over the 'fifth engine' issue.

Concerned that too many drivers will easily run through their allocation of four engines and start serving multiple grid penalties, talks about adding another 'power unit' took place recently.

"There was a certain degree of unanimous agreement amongst the teams in Malaysia," said McLaren-Honda's Jonathan Neale. "I think that position has changed a bit from what I can pick up in paddock rumour at the moment."